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On placing a thin film of mica of thickn...

On placing a thin film of mica of thickness `12xx10^(-5)cm` in the path of one of the interfering beams in young's double slit experiment using monochromatic light, the fringe pattern shifts through a distance equal to the width of a bright fringe. If `lamda=6xx10^(-5)cm`, the refractive index of mica is

A

1.33

B

1.5

C

2.5

D

1.4

Text Solution

Verified by Experts

The correct Answer is:
B
`S=((mu-1)tD)/d` and `w=(lamdaD)/d` given, `S=wrArrmu=(lamda/t+1)=1.5`
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